section,header,article,nav{
    display: block;
}
* {
    padding: 0;
    margin: 0;
}
body{
    margin: 1rem 10%;
    background-attachment: fixed;
    background-position: top left;
    background-repeat: repeat-x;
    max-width: 80rem;
}
header{
    background-position: bottom right;
    border-width: .1rem;
    border-style: solid;
    border-bottom-width: 0;
}
header nav{
    background-position: bottom left;
    background-repeat: repeat-x;
    border-width: .1rem;
    border-style: solid;
    border-bottom-width: 0;
    border-top-width: 0;
    padding-left: 10%;
}
header nav ul{
    width: 100%;
    overflow: hidden;
    border-left-width: .1rem;
    border-left-style: solid;
}
header nav li{
    display: inline;
}
header nav li a{
    display: block;
    float: left;
    padding: .5rem 2rem;
    border-right: .1rem solid;
}
article {
    border-width: .1rem;
    border-style: solid;
    border-top-width: 0;
    padding: 2rem 10%;
    line-height: 1.8rem;
}
article img{
    border-width: .1rem;
    border-style: solid;
    outline-width: .1rem;
    outline-style: solid;
}